Vertx test on context issues deploying verticle

[Havhev Car My]

So this is a bit of a sneaky one, it doesn't occur 100% of the time, but this is the situation:

I created a `JUnit` integration class, declared a `Rule` to run on context, then i extract the `vertx` object from the rule. Then i deploy new verticles to the `vertx`, and if try to deploy more than ~3-4 verticles i get this for each verticle:

    Jan 09, 2017 2:43:33 PM io.vertx.core.impl.ContextImpl

    SEVERE: Unhandled exception

    java.lang.IllegalStateException: Result is already complete: succeeded

    at io.vertx.core.impl.FutureImpl.checkComplete(FutureImpl.java:164)

    at io.vertx.core.impl.FutureImpl.complete(FutureImpl.java:108)

    at io.vertx.core.impl.FutureImpl.handle(FutureImpl.java:135)

    at io.vertx.core.impl.FutureImpl.handle(FutureImpl.java:23)

    at io.vertx.core.eventbus.impl.EventBusImpl.lambda$callCompletionHandlerAsync$2(EventBusImpl.java:340)

    at io.vertx.core.impl.ContextImpl.lambda$wrapTask$2(ContextImpl.java:316)

    at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)

    at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:418)

    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:440)

    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:873)

    at java.lang.Thread.run(Thread.java:745)

The code causing this issue looks like that:

    @RunWith(VertxUnitRunner.class)

    public class VertxTest {

    

        @Rule

        public RunTestOnContext rule = new RunTestOnContext(Vertx::vertx);

        @Test

        public void testLinearExecution(TestContext context) {

            Vertx vertx = rule.vertx();

            vertx.deployVerticle(new AbstractVerticle() {

                @Override

                public void start() throws Exception {

                    this.vertx.eventBus().consumer("bla", event -> {});

                }

            });

            vertx.deployVerticle(new AbstractVerticle() {

                @Override

                public void start() throws Exception {

                    this.vertx.eventBus().consumer("bla", event -> {});

                }

            });

            vertx.deployVerticle(new AbstractVerticle() {

                @Override

                public void start() throws Exception {

                    this.vertx.eventBus().consumer("bla", event -> {});

                }

            });

            vertx.deployVerticle(new AbstractVerticle() {

                @Override

                public void start() throws Exception {

                    this.vertx.eventBus().consumer("bla", event -> {});

                }

            });

            vertx.deployVerticle(new AbstractVerticle() {

                @Override

                public void start() throws Exception {

                    this.vertx.eventBus().consumer("bla", event -> {});

                }

            });

            vertx.deployVerticle(new AbstractVerticle() {

                @Override

                public void start() throws Exception {

                    this.vertx.eventBus().consumer("bla", event -> {});

                }

            });

        }

    

    }

It might depend on the machine running it, but my guess is that if it doesn't reproduce, add more of those guys to make it more probable:

    vertx.deployVerticle(new AbstractVerticle() {

        @Override

        public void start() throws Exception {

            this.vertx.eventBus().consumer("bla", event -> {});

        }

    });

Another thing to mention is that if i change `Vertx vertx = rule.vertx();` with `Vertx vertx = Vertx.vertx();`, i get the warning message to console, but the problem goes away.

So, am i doing something wrong? Is it an issue?

[Julien Viet]

it is only logging, nothing should affect your app or runtime

please see : https://github.com/eclipse/vert.x/issues/1658

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[Havhev Car My]

Hi Julian, thanks for the reply. It actually breaks the test although not having any production-related issues.
For now I'm using Vertex.vertx() to walk around it. Just wanted to make sure I hit a known issue and not did something wrong.

Thanks.

[Julien Viet]

how does it break your test ?

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[Havhev Car My]

Your'e right....i'm sorry, i've was seeing too many red lines in the console so i ignore the green one mentioning the test pass.

Sorry and thanks.